I could gape you could gape she could gape we could gape you could gape they could gape
V-ing form
I could be gaping you could be gaping she could be gaping we could be gaping you could be gaping they could be gaping
Perfect
I could have gaped you could have gaped she could have gaped we could have gaped you could have gaped they could have gaped
V-ing perfect
I could have been gaping you could have been gaping she could have been gaping we could have been gaping you could have been gaping they could have been gaping
Negation
Simple form
I couldn't gape you couldn't gape she couldn't gape we couldn't gape you couldn't gape they couldn't gape
V-ing form
I couldn't be gaping you couldn't be gaping she couldn't be gaping we couldn't be gaping you couldn't be gaping they couldn't be gaping
Perfect
I couldn't have gaped you couldn't have gaped she couldn't have gaped we couldn't have gaped you couldn't have gaped they couldn't have gaped
V-ing perfect
I couldn't have been gaping you couldn't have been gaping she couldn't have been gaping we couldn't have been gaping you couldn't have been gaping they couldn't have been gaping
Interrogative form
Simple form
could I gape? could you gape? could she gape? could we gape? could you gape? could they gape?
V-ing form
could I be gaping? could you be gaping? could she be gaping? could we be gaping? could you be gaping? could they be gaping?
Perfect
could I have gaped? could you have gaped? could she have gaped? could we have gaped? could you have gaped? could they have gaped?
V-ing perfect
could I have been gaping? could you have been gaping? could she have been gaping? could we have been gaping? could you have been gaping? could they have been gaping?
Interro-negative form
Simple form
couldn't I gape? couldn't you gape? couldn't she gape? couldn't we gape? couldn't you gape? couldn't they gape?
V-ing form
couldn't I be gaping? couldn't you be gaping? couldn't she be gaping? couldn't we be gaping? couldn't you be gaping? couldn't they be gaping?
Perfect
couldn't I have gaped? couldn't you have gaped? couldn't she have gaped? couldn't we have gaped? couldn't you have gaped? couldn't they have gaped?
V-ing perfect
couldn't I have been gaping? couldn't you have been gaping? couldn't she have been gaping? couldn't we have been gaping? couldn't you have been gaping? couldn't they have been gaping?